The following is from the bottom of Para. 47 in CMHQ report 141:
“Many of the replaced 7 equipments in North-West Europe were converted into armoured personnel carriers by removing the guns, and under the name of Kangaroos rendered valuable service (para 96 below). The guns were later replaced and the equipment turned over to the Americans.”
http://www.forces.gc.ca/hr/dhh/Downl...hq/cmhq141.pdf